Fluke                                                       MET/CAL Procedure
=============================================================================
INSTRUMENT:            Fluke 51: CAL ADJ /5520
INSTRUMENT:            Fluke 52: CAL ADJ /5520
DATE:                  19-Aug-97
AUTHOR:                Fluke Corporation
REVISION:              $Revision: 1.1 $
ADJUSTMENT THRESHOLD:  70%
NUMBER OF TESTS:       1
NUMBER OF LINES:       99
CONFIGURATION:         Fluke 5520A
CONFIGURATION:         Fluke 45
STANDARD:              Fluke 80T-150U
=============================================================================
#
# Source:
#   Fluke 51,52 Service Manual (PN 768234 February 1986).
#
# Compatibility:
#   5500/CAL 5.0 or MET/CAL 5.0 or later
#
# Subprocedures:
#   None
#
# Required Files:
#   None
#
# System Specifications:
#   TUR calculation is based on specification interval of the accuracy file.
#   The default 5520A accuracy file contains 90 day specs.
#
# Fluke makes no warranty, expressed or implied, as to the fitness
# or suitability of this procedure in the customer's application.
#
# The 90 day specifications of the 5520A are used in TUR computations.
#
 STEP    FSC    RANGE NOMINAL        TOLERANCE     MOD1        MOD2  3  4 CON
  1.001  STD          Fluke 80T-150U
  1.002  ASK-         N                                                    W
  1.003  HEAD         PRELIMINARY INSTRUCTIONS
  1.004  DISP         [32]                     CAUTION
  1.004  DISP         When you are directed to short a switch grid, use only
  1.004  DISP         the elastometric switch pad that is supplied, as PCA
  1.004  DISP         damage could occur if a hard tool is used.
  1.005  DISP         Turn UUT off and remove the top case leaving the PCA in
  1.005  DISP         the bottom of the case.
  1.006  DISP         Simultaneously short the TP1 grid and turn on the UUT by
  1.006  DISP         shorting the ON/OFF switch grid.
  1.006  DISP         Hold the elastomeric switch pad on TP1 for at least 3s
  1.006  DISP         after turn on. This puts the UUT into the TC Cal mode.
  1.007  DISP         Allow the UUT to stablize at room temperature,
  1.007  DISP         23+/-5degC (73+/-9degF).
  1.008  DISP         Setup the UUT to display degrees C if not already.
  1.009  JMPT         1.012          Fluke 51: CAL ADJ /5520
  1.010  MEM2         =T1
  1.011  DISP         Select T1.
  1.012  DISP         Connect the 5520A TC terminals to the UUT [MEM2]
  1.012  DISP         terminals using a type K, SMP plug to SMP plug cable.
  1.013  DISP         Polarity is important, so connect the positive side
  1.013  DISP         to the narrow thermocouple blade and the negative side
  1.013  DISP         to the wide blade. When using this connector with the
  1.013  DISP         UUT case top removed, make sure that the wide blade is
  1.013  DISP         oriented the same as the case top would normally allow.
  1.014  5520         25.2degC                                    _K TC S  2W
  1.015  DISP         Allow the meter reading to settle and then adjust the
  1.015  DISP         [MEM2] offset adjustment (R7) for a display reading of
  1.015  DISP         25.2+/-0.1degC.
  1.016  JMPT         1.022          Fluke 51: CAL ADJ /5520
  1.017  5520         *                                                 S
  1.018  DISP         Select T2.
  1.019  DISP         Connect the 5520A TC terminals to the UUT T2
  1.019  DISP         terminals using a type K, SMP plug to SMP plug cable.
  1.020  5520         25.2degC                                    _K TC S  2W
  1.021  DISP         Allow the meter reading to settle and then adjust the
  1.021  DISP         T2 offset adjustment (R13) for a display reading of
  1.021  DISP         25.2+/-0.1degC.
  1.022  5520         1370.0degC                                  _K TC S  2W
  1.023  DISP         Allow the meter reading to settle and then adjust
  1.023  DISP         R21 for a display reading of 1370.0+/-0.4degC.
  1.024  5520         *                                                 S
  1.025  DISP         Disconnect the 5520A from the UUT.
  1.026  DISP         With an elastomeric switch pad in both hands, use the
  1.026  DISP         left one to short out the TP2 grid, and use the right
  1.026  DISP         one to first turn on the instrument and then quickly
  1.026  DISP         short out the VIEW switch grid. Hold this position
  1.026  DISP         until the display is held in self-test. This puts the
  1.026  DISP         UUT into the Reference Junction Sensor calibration mode,
  1.026  DISP         and the VIEW maneuver turns off a filter so that the
  1.026  DISP         reading settles immediately.
  1.027  DISP         Connect the 80T-150U Temperature Probe to the 45 Volt
  1.027  DISP         Ohm Diode and COM terminals.
  1.028  DISP         Place the probe tip against the reference junction
  1.028  DISP         transistor (Q1) located in the middle hole of the
  1.028  DISP         isothermal block.
  1.029  45           23.0mV                                            N  2W
  1.030  DISP         Adjust R16 for a reading of [MEM]degC.
  1.031  DISP         Disconnect the 5520A from the UUT.
  1.032  DISP         Power down the UUT and reassemble.
  1.033  END